A small light bulb (25 W) inside a refrigerator is kept on and 50 W of energy from the outside seeps into the refrigerated space. How much of temperature difference to the ambient(at 20 C) must the refrigerator have in its heat exchanger having an area of 1 m2 and heat transfer coefficient of 15 W/Km2 to reject the leak of energy.

A small light bulb (25 W) inside a refrigerator is kept on and 50 W of

1.	A small light bulb (25 W) inside a refrigerator is kept on and 50 W of energy from the outside seeps into the refrigerated space. How much of temperature difference to the ambient(at 20 C) must the refrigerator have in its heat exchanger having an area of 1 m² and heat transfer coefficient of 15 W/Km² to reject the leak of energy.
A.	0 C
B.	5 C
C.	10 C
D.	15 C
Answer» C. 10 C

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